Chivalry of a Failed Knight

The story is set in an Alternate Earth world where humans called "Blazers" have supernatural abilities. These Blazers can materialize weapons known as "Device" which are made through a person's soul. At Hagun Academy, Blazers are selected as representatives for the Seven Star Sword Art Festival, an annual tournament event held by the seven Mage Knight Academies in Japan to determine the strongest Apprentice Knight.